diff --git a/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTCollections.cc b/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTCollections.cc
index ed0856345846b..3e1a38aad1392 100644
--- a/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTCollections.cc
+++ b/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTCollections.cc
@@ -2,6 +2,8 @@
 
 #include "GMTCollections.h"
 
+#include <string>
+
 namespace l1t {
    namespace stage2 {
       GMTCollections::~GMTCollections()
diff --git a/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTSetup.cc b/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTSetup.cc
index 93d1cd117b4a8..2edf1dfda7767 100644
--- a/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTSetup.cc
+++ b/EventFilter/L1TRawToDigi/plugins/implementations_stage2/GMTSetup.cc
@@ -10,6 +10,7 @@
 #include "GMTSetup.h"
 
 #include <array>
+#include <string>
 
 namespace l1t {
    namespace stage2 {